curl --request GET \
  --url https://api.pawpayments.com/api/v2/invoices/{invoice_id} \
  --header 'x-api-key: <api-key>'

{
  "ok": true,
  "result": {
    "accepted_coins": [
      "usdt_tron",
      "usdc_eth"
    ],
    "address_from": null,
    "address_to": "TXk2Y5...redacted",
    "amount": 49.5,
    "asset": "usdt_tron",
    "billing_type": "fiat",
    "created_at": 1763398800,
    "description": "1 month subscription",
    "excluded_coins": null,
    "expires_at": 1763400600,
    "external_id": "f2c8a3d1-4b7e-4f8a-9c1d-2e3b4a5c6d7e",
    "extra": "order-12345",
    "fee_bearer": "merchant",
    "fiat_amount": 50,
    "fiat_currency": "USD",
    "initial_amount": 49.5,
    "initial_asset": "usdt_tron",
    "initial_fiat_amount": 50,
    "metadata": {
      "customer_id": "u_42"
    },
    "notify_url": "https://shop.example.com/webhook/paw",
    "on_cancel_url": "https://shop.example.com/cancel",
    "on_paid_url": "https://shop.example.com/thanks",
    "order_id": "65f1c3a4e8b1c2d3a4b5c6d7",
    "original_amount": 50,
    "payer_info": null,
    "payment_url": "https://pay.pawpayments.io/checkout/f2c8a3d1-4b7e-4f8a-9c1d-2e3b4a5c6d7e",
    "permanent_address_id": null,
    "price_modifier": -1,
    "processed_at": null,
    "received_amount": 0,
    "status": "created",
    "title": "Premium plan",
    "txid": null,
    "type": "token",
    "underpay_tolerance": 0.01,
    "user_id": null
  }
}